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Selective oxidation of ternary Fe-Mn-Si alloys during annealing process
Corrosion Science ( IF 8.3 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.corsci.2020.108859
Xue Zhang , Cauê Corrêa da Silva , Chang Liu , Manoj Prabhakar , Michael Rohwerder

Abstract Selective oxidation of Fe2MnxSi alloys with various Si contents annealed in a gas mixture of H2/H2O (p(O2) = 6.5×10−25 bar at 700 °C) for 2 h was investigated. The oxidation kinetics of all the alloys followed linear growth, indicating that most likely oxygen uptake was the rate-determining step. The addition of Si into Fe2Mn eliminated the formation of the ridge-like MnO at the surface, mainly on the grain boundaries, but significantly accelerated the internal oxidation especially along grain boundaries. The effects of Si on the external and internal oxidation including the morphology, distribution and chemistry of the oxides are discussed.

中文翻译:

三元Fe-Mn-Si合金在退火过程中的选择性氧化

摘要 研究了在 H2/H2O(p(O2) = 6.5×10-25 bar,700 °C)混合气体中退火 2 小时的不同 Si 含量的 Fe2MnxSi 合金的选择性氧化。所有合金的氧化动力学都遵循线性增长,表明最有可能的氧气吸收是速率决定步骤。在 Fe2Mn 中加入 Si 消除了表面脊状 MnO 的形成,主要是在晶界上,但显着加速了内部氧化,尤其是沿晶界。讨论了 Si 对外部和内部氧化的影响,包括氧化物的形态、分布和化学。
更新日期:2020-09-01
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